Mechanical pencil



May 6, 1924.

T. HUNT AM''ECHANIGAL PENCIL Filed May 15 1922 ATTORNE'Y Patented May 6, 1924.

UNITED STATES Ammin HUM. erv encontra, knew vous.

Macuarium Benali..

Application med May l5,

To all whom t may concern.' c

Be it known that I, ALFRED T. HUNT, a citizen of' the United States, residing in Brooklyn, in the county of Kings, city and State of New York, have inventedcertain new and useful Improvements inv Mechanical Pencils, of which the following is a full, clear, and concise description.

My invention relates to mechanical pencils: that is, to pencil bodies made` of metal and carrying small bars of black lead which are used'one at a time and fed out as consumed in writing, or as needed.

The urposeof my invention isy to im,- prove tie construction of the pencil, and to simplify it and cheapen its cost of manufacture. Y

Reference is made to the accompanying drawing forming a part of this specification', and in which like reference characters indicate like parts throughout the several lligures.

Figure 1 is a side view of my improved pencil, showin it partly in central section and partly in e evation.

Figure 2 is a side `elevation of the inner barrel, and parts carried thereby.

Figure 3 is a section on the line 3-3 of Figure 1, looking in the direction indicated by the arrows.

lThe outer barrel of my improved pencil appears at 4, and has, generally speaking, a` cylindrical form. It is provided fyvith an end portion 5 having substantiallyv the form of af cone, and provided at its tip with a hole 6.

Mounted upon the outer barrel 4 is a clip 7, for supporting the pencil by holding it upon the clothing of the person carrying it, in the manner well known in this art.

Located within the outer barrel 4 is a nut 8, having generally a cylindrical'forrn and of rather massive construction. The nut 8 carries a tube 9, provided with an end portion 10 of slightly smaller diameter than the rest of the tube, so as to fit snugly about a small bar 11, of graphite or other* appropriatematerial, used as a lead for the pencil. The tube .9 extends into a hole in the nut 8, and is secured therein, either by fitting it tightly in position, or by solderin 4, as the case may be. The tube 9 exten s nearly but not quite the full length of the nut 8, in the direction of the axis thereof.

The nut 8 is provided with a swivel head 1922. Seril N9 561210.25

12, integral with it and having a form indy. cated more particularly in Figure l,

The nner'barreliappears at .13, andhas substantially a cylindrical form. It is provided with an endportion 14 cupped inwardly, as indicated in Figure l, arid thus slightly overhangingthe outer edges of the swlvel head i12. "The'inner barrel 13 is provided with indentations 14a, the form of which maybe understood from Figures 2 and 3. These indentations' are so formed that the inner barrel contains passage Ways 15, disposed in pairs as may be understood from Figure A screw eye 16 lits neatly into one pair of these passage ways, as indi-y cated in Figures 1 and 3. This screw eye is integral with a screw stem 17, which ex-l tends through a threaded portion 18 of the nut 8 and into the tube 9( The portion of the screw stem which extends into the tube 9 fits rather snugly thereinto, but without binding upon theI tube. The screw is threaded, however, and so fitted to the threaded portion 18 of the nut, that whenever the screw eye 16 is turned so as to rotate the screw stem 17 relatively to the nut, the screw stem is moved in the direction of its length, and thus fed further into, or partially withdrawn from, the tube 9.

The nut 8 is secured firmly to the outer barrel 4, either byvpeening as indicated at 19, or by use of softsolder,

The inner barrel 13 carries a disk 20, held firmly within it by peening as indicated at 20, or by soldering, as the case may be, The partition 20, and ,the portion ofthe inner tube shownl below the same according'r to Figure 1, togetherpserve as a magazine for yholding a number of leads 21; that is, small bars made of graphite or other suitable materiai', and used inthe manner well known in this art. .l

A rubber eraseris fitted into,,the-.1fachy jacent end of the inner barrel 13. This rubber eraser serves tliedouble purpose of an ordinary eraser foruse in rubbing out pen,- cil marks or the li Wand a stopper for closing the adjacent .;of the inner barrel 13, or in other words vacting as a closure member for the maga-zine.

A cap 23 is detachably fitted upon the end of the inner barrel 13, as may be understood from Figure 1.

For facilitating this purpose, the inner barrel 13 may be tapered. very slightly adjacent its lower end accordingly to Figure 2, as shown.

The operationof 'i'n'yl device is followsij The various parts are assembledand fitted together as shown in the drawing, and' as above described.

the eraser 2Q, which is forcedinto position as shown in Figure 1 and serves as av stopper, as above described. The cap 23 is next fitted into position. j

a angie ier-a ii, being piacai Winn-arie tube 9, is brought into lsuch position that4 it maybe fed outwardly undeiffactio'n of the screw stem 19,` and used up 'as required. The opera-tor byjinerely graspingfthe outer barrel and turning thel head 23 may cause the screw eye y16, and consequently the screw stein 17, to rotatein either of two direc-A tions. Thus the screw sternis shifted bodily but slowly' in either direction of its length.

struction shown, as `variationsfinay` be made therein without ydeparting from my inven-kf tion, the scope. of which is commensurate with my claims. y l Having thus described my invention, what I claim as new and desireto secure b yLetters Patent is as follows: v

l. A mechanical pencil. comprising an outer barrel, a nutl mounted within said outer barrel and fixed .relatively thereto, said nut being :provided 'witlr all threaded opening andwvith .avswiv'el head, an inner barrel provided with aportion engaging, saidswivel head, softhat said inner ba'rrelis revoluble. relatively to. said ,outer barrel, saidv inner barrel being further provided'witli passage ways, a.- screw'I provided withan eye fitted slida-bly into lsaid passage ways, .said screw beingurther provided with a thread.

ed stem extending" through said threaded opening of 'said nut,l and a tube carried by said nutI for thepurposeof holdingadead, said tube fitting snuglywoven the :adjacent portion of saidthreadedl stennsd thatl said threaded stem,`by. moving in the directionfof its own length, can actuate said lead, i

2, A mechanical pencil. comprising, an

outer barrel provided with, agsubstantially A number of' ,lea-ds. 21 are` placed in one end of the inner barrel 13,. serving as a magazine, and held therein by extending: into said` substantially conical portionpof said outer barrel, a screw p-ro- "videdl with a threaded stein extending through theY threaded opening in said nut and also extending i'nto said tube, said screw being provided with an eye, and an inner barrel fitted into said outer barrel and provided with a portion engaging said nut, for the purpose ofl preventing said inner bare relfroin travelingin the direction of its length relatively to said nut and yet permitting said inner barrel to tuinrelatively to said nut and to said outer barrel.

In7 device of the character described the combination of an outerv barrel, a nut fitted into said outer barrel and prevented from rotatingrelatively thereto, said. nut being provided with a threaded opening, a tube carried by said nut, a screw extending throughsaid threaded opening and thus operatively connected with the nut, said screw extending loosely into said tube and making a. snug fit therein, said screw being provided with an eye, and an inner barrel enclosing said` eye and revolubly fitted into said outer barrel, said inner barrel having generally a cylindrical form and being provided with passage ways into which said eye extends.l

' 4l. In a mechanical pencil the combination of an outer barrel provided with a substantially conical end portion, a nut fitted into saidouter barrel and fixed in position relatively-to said outer barrel, said nut having a swivel head and a threaded opening extending axiallyl through said swivel head, and an inner `barrel `provided with an `end portion cupped inwardly and enclosing said swivel head, thus. enabling said inner barrel to', be turned relatively to said outer barrel, said inner barrel being made of sheet metal and provided with indentations extending in the direction of the length of the barrel, so `formed that the inner barrel is thus providedwith passage ways, a screw provided with an eye fitted slidably into said passage ways, so thatrotation of the inner barrel causes the .screw to turn, said screw being further provided wit-ha threaded portionl extending through the threaded open.- ing in the nut, `and a tube connected with the nutand so positioned relatively thereto that'said screw 4extends into said tube.

ALFRED T. HUNT. y 

